1 . Through ______ effort, Yuan Longping overcame enormous technical difficulties to develop the first hybrid rice.
A.normal | B.intense | C.odd | D.weak | E.sour |
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2 . These volunteers offered ________ service for the elderly in the community, which was highly appreciated.
A.sharp | B.invisible | C.various | D.odd |
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3 . A person or animal that is ________ has the ability to think, understand, and learn things quickly and well.
A.stressful | B.anxious | C.intelligent | D.odd |
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